Dump-door-operating mechanism.



H. A. BOWEN.

DUMP DOOR- OPERATING MECHANISM- APPLICATION FILED 00T.18, 1910.

1, 1 12,593. Patented Oct. 6, 1914.

6 SHEETS-SHEET 1.

THE NORRIS PETERS CO.. PHOTD-LITHO4 WASHINGTON. D, c.

H. A. BOWEN. DUMP DOOR OPERATING MECHANISM. APPLICATION FILED 00m. 1a,1910.

1,1 12,593. Patented Oct. 6, 1914.

S3 6 SHEETS-SHEET 2.

N O R KAI/ 4d am WWW, dwaww z THE NORRIS PETERS 60 PHOTO-LITHQ.WASHINGTON. n. c.

H. A. BOWEN.

DUMP DOOR OPERATING MECHANISM.

APPLICATION FILED OCT. 18, 1910.

Patented Oct. 6, 1914.

6 SHEETS-SHEET 3 5 {7y 7 ,xww w flm THE NORRIS PETERS C0,. PHOTO-LITHO..WASHINGTON. D, c

H. A. BOWEN. DUMP DOOR OPERATING MECHANISM.

APPLIOA TION FILED OUT. 18, 1910.

Mg W m j 1 W THE NofiRIs PETERS 60., PHOTO-LITHO., WASHINGTON. U. C,

H. A. BOWEN.

DUMP DOOR OPERATING MECHANISM.

APPLIOATION FILED OUT. 18, 1910.

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THE NORRIS PEYERS 60., PHOTO-LITHO.. WASHINGTON. n. C.

H. A. BOWEN. DUMP DOOR OPERATING MEGHANISM. APPLIOATION FILED OUT. 18,1910, 1,1 12,593, Patented 0ct.6,1914.

6 SHEETS-SHEET 6.

Z J e zfier 30 wem Mam? THE Nofims PETERS C0.,FHOTo-Llri-10.,WASHINGTON. D. C.

from their door supporting positions.

UNITED STATES PAT enrich.

HERBERT A. BOWEN, F CHICAGO, ILLINOIS, ASSIGNOR T0 NATIONAL DUMP CARCOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF MAINE.

DUMP-DOOR-OPEEATING MECHANISM.

Specification of Letters latent.

Patented Oct. 6, 1914:.

To (ZZZ whom it may concern:

Be it known that 1, HERBERT A. Bowen, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in DumpDoor-Operat'inglilechanism, of which the following is a specification.

My invention relates to dump cars and has for its object the providingof improved mechanism for operating the dump doors.

My invention relates more particularly to the hopper types of cars whichhave sloping end walls leading to a central discharge opening, though itmay be applied to other forms of dump cars.

My invention is adapted to permit all of the doors to be operated fromeither side of the car.

A further object of my invention is to provide a mechanism which willpermit the operation of the doors on one side only of the car by anoperator who may be stated ing at either side of the car.

My improvements are related to doors which are hinged at the sides ofthe car and have their meeting edges at the center of the car, saiddoors being supported in their closed positions by movable supportingshafts or members lying longitudinally of the car. My improvements,however, are applicable to other arrangements than the above.

My improvements comprise more specifically, ratchet bars havingmovements transversely of the car. said ratchet bars being adapted toengage the supporting shafts and cause movements thereof toward or awayThese ratchet bars are operated by means which can be actuated. ateither side of the car, and the direction of the movement produced maybe controlled by the operator from that side.

Other objects of my improvements will be made more apparent in thefollowing specification, taken in connection with the iiceompanyingdrawings, and the novel elements and combinations thereof will be setforth in the claims.

In the drawings Figure 1 is a side elevation of a hopper type of dumpcars with my improvements applied thereto. Fig. 2 is a cross section ofthe lower portion of said car, taken substantially along the line 2 2 ofF 1 and the line 22 of Fig. 4. Fig. 3 is a horizontal section of a lowercentral portion of the car, taken substantially. on the lines 33 of Fig.4c and 33 of Fig. 2 with the dump doors and other portions of themechanism omitted. Fig. at is a vertical section taken on the line H ofFig. 2. Fig. 5 is a vertical section of the central lower portion of thecar, taken substantially along the line 55 of Fig. 2. Fig. 6 is anelevation of one of the guide plates through which the ends of theoperating levers project. Fig. 7 is a detail of a portion of theoperating lever. Fig. 8 is a side elevation of the same. Fig. 9 is asectional detail of the dump doors. Fig. 10 is a perspective view of theratchet bars, detent bars, and counterweights shown removed from thecar, in incomplete and diagrammatic form to show their relation. Fig. 11is a cross section on the line 11-11 of Fig. 3. Fi 11 is a cross sectionon line 11 of Fig. 2. Fig. 12 is a detail showing the form of theratchet teeth.

In the drawings 1 have preferred to illustrate my improvements inconnection with a car of the hopper type constructed chiefly of steel.In the said car the side walls 10 are made of steel plates, and thesloping end walls 11 are also made of steel plates suitably joined attheir lateral edges to the side walls 10. The sloping plates 12 areattached to the side walls 10 at their upper edges and terminate invertical portions 13 adjacent their lower edges, these vertical portionsforming the side walls of a central discharge opening. The sloping endwalls 11 are also provided with vertical portions ll near their loweredges, which serve as vertical end walls for the said central dischargeopening. These vertical portions l1 terminate in flanges or lips 11,against which the dump doors close, as will be described later.

The central discharge opening is divided into two parts, which are ineffect separate openings, by steel plates 1 1 and 15, which have slopingportions meeting at their upper edges. These plates 14: and 15 are oinedtogether at said ed es by means of the flanges 18 and 19, through whichare placed rivets or other suitable fastening devices. The lowerportions 16 and 17 of these plates 1.4 and 15 are given a verticalposition and serve as walls for the two portions of the centraldischarge opening. These vertical portions 16 and 17 terminate at theirlower edges in horizontal lips or flanges 16 and 17. The dump doors 202lwhen in their closed positions bear against the under surfaces of thelips 11 16 17 the.

The plates l-l and 15 are held rigidly in position by the angle bars 22and 23, which extend transversely of the car and are secured tolongitudinal frame members 2-l25. Other longitudinal frame members 2627are attached to the lower edges of the side walls 10. vlntermediatetransverse members 28 extend from the member 24: to the member2i' andfrom the member to the member 26.

The dump doors 20, 21, &c., are pivotally attached to the members 21 25,at 29, 29. The doors 20-2l are provided with stiffenin'g ribs 30, whichare upwardly turned at their outer ends and serve as means for theattachment of the hinge members. These ribs 30 are provided with asloping portion 31 which terminates in a horizontal portion 32 spacedfrom the body of the doors 20-21 by Z-bars 33, or the like. These Z-barshave horizontal flanges to which the ribs 30 are secured, and similarhorizontal flanges by which they are secured to the bodies of the doors.

The ribs 30 rest upon the rollers 86, which are rotatively mounted uponthe supporting shafts 37. Shafts 37 are preferably square and areprovided with sleeves 33 having a square, axial opening fitted to thesquare shaft, and having a cylindrical outer surface to which the saidrollers 36 are rotatively fitted. The doors are held in their closedpositions by said rollers which bear upon the horizontal portions 32 ofthe ribs 30. When said rollers are moved away from. this horizontalposition, or outwardly from the center of the car. they roll along theinclined portions 31 and allow the doors 20 and 21 to drop. My inventionis more particularly related to the means by which the shafts 37 aremoved away from and returned to their normal door-supporting positions,said positions being shown in Fig. 9 and others.

The sleeves 33 rest upon the supporting bars 39, which have horizontalportions 39 upon which the sleeves roll, as upon a track, and verticalend portions 39 and 39 by which they are rigidly attached to the carframe. The vertical port-ions 39 are attached to the transverse anglebars 22 by suit-able rivets or other fastening means 39. They are alsoattached to transverse plates 4.0, which have positions directly belowthe vertical legs 22 of said angle bars and are secured to the verticalportions 1.6. 17 of the plates lat, 15. The lower edges of the plates450 serve as means for guiding the sleeves 38., and hence the shafts 37,and they serve more strictly as means for preventing the shafts risingout of contact with the supporting bars 39. These transverse plat-cs a0serve as continuations of the walls 16, 1'7 and complots the housing orprotecting means for the greater part of the door-operating mechanism.

The sleeves 38 have gears 11 integral with or attached to them at theirends, the teeth of said gears meshii r with teeth or pins d2 fixed tothe supporting bars 39. The row of pins 42 on each bar 39 serves as arack in which the gears il operate when rotating to cause a movement ofthe shafts 37 on said track bars 39. Each shaft also carries two ratchetwheels 43, 43, and L3 43 which mesh with and are driven by ratchet bars44:, a4 and in, M9 The teeth of the two ratchet wheels l3, er slope inopposite directions and mesh with the teeth of the ratchet bars H, lat,which also slope in opposite directions and which are adapted to meshwith the teeth of their corresponding ratchet wheels. The teeth of theratchet bar ll are adapted to engage the teeth of the ratchet wheel whenmoving toward the left, viewed in 2 and 3, and to slip over said teethinto a position making a new engagement with said teeth when movingtoward the right, as viewed in Figs. 2 and 3. The teeth of the ratchetbar -14. are adapted to engage the teeth of the ratchet wheel 43 whensaid ratchet bar moves toward the right, as viewed in Figs. 2 and 3, andto slip over said teeth into position to make a new engagement with saidratchet wheel when moving toward the left, as viewed in Figs. 2 and 3.The teeth of the ratchet bar Hrare adapted to engage the teeth of theratchet wheel d3 when said ratchet bar is given a movement toward theleft, as viewed in Figs. 2 and 3, and to slip over the teeth of said"atchet wheel into a position ready to make a new engagement with theratchet wheel 43 when moving toward the right. as viewed in Figs. 2 and3. The teeth of the ratchet bar 44 are adapted to engage the teeth ofthe ratchet wheel st3 when the said ratchet bar is given a movementtoward the right, as viewed in F igs. 2 and 3, and to slip over theteeth of the ratchet wheel ll 6 when moving toward the left, as viewedin Figs. 2 and 3. The reciprocating movements of said ratchet bars areeffected by means of levers 48, 48 which are pivotally attached to thecar body by means of a pin d7. These levers extend to the sides of thecar within reach of the operator. A downwardly extending arm 46 is fixedto these levers and is pivotally attached to the above described ratchetbars 44, 4:41, d ft- 4: 1;.

The ratchet bars are arranged in pairs 44 and 4A forming one pair, l-(land 4 1: forming another pair, in such a manner that one ratchet baronly of each pair can be engaged with its respective ratchet wheel atthe same time. The ratchet bars ii and ta are rigidly attached to acommon center piece t-i which is pivotally attached to the downwardlyprojecting arm l-G. They thus con stitute, in ettect, a single bar andare made in sepa ate pieces for constructive reasons only. The ratchetbars at and lt also con stitute a single bar in ettect and are rigidlyattached to a center piece l-i which is also pivotally attached to thedownwardly projecting arm at The ratchet bars tc and H", as well as thebars and el t are so attached to their center pieces i l and it respectively, that they have positions relative to each other, makingangles of less than 180 degrees in order that both of said ratchet barscannot make engagement with their respective ratchet wheelssimultaneously. In other words, when one of the ratchet bars A, forinstance, is engaged with the ratchet wheels the other ratchet bar ltmust be free of its rachet wheel The center pieces ist and e have anangular form with their hubs and l located at the apexes of the angles.These hubs form the means for making pivotal attachment with the arm 46,a pin to being inserted through said hubs and through the eyes i6, 46and a8 at the lower extremity of the said arm s6.

The arm 46 is preferably of rectangular form, having a considerablewidth in the direction of th axes of the pins 4-5 and 67. Kotches 46 and46 in the lower portion of this arm 46 facilitate the attachment of thecenter pieces as and i4 The arm 46 is provided with laterally extendingwings 46 and d6 to which the levers 48, 48 are riveted. The ratchet barsare preferably riveted to the center pieces set, dat as shown at it. Thepin a? is supported in bearings 51, 52, which are fined to the plates 4017, and 4-0, 16.

The teeth of the pair of bars 4%, 449 all slope in the same direction,and the teeth of the pair of bars it and 9? all slope in one direction,but in the opposite direction to those of the other pair. All of theteeth on the pair of bars let and ii are adapted to cause rotation, andhence a movement of the shafts 87 toward the left, as viewed in 2 andAll of the teeth on the pair of bars ii and 44: are adapted to cause arotation, and hence movement or the said shafts 37150- ward the right,as viewed in Figs. 2 and 3. One only, however, of the ratchet bars 4A,4st can be in engagement with a ratchet wheel at a time, and the same istrue with the pair of bars ts, i It will be observed that it is usuallydesired to more the shafts 3? in oppo t lirections at the same time.Ti'hen it is desired to move the siafts 3? toward the center of the carand close the doors, the ratchet bar at will be pl aced in engagementwith the ratchet wheel and the ratchet bar l t will be placed inengagement with the ratchet wheel tti The other ratchet ii. a l will atthis time be out of enement with their respective ratchet Areciprocating movement of the r bars under these conditions will causethe shafts 3'? to be moved toward the center of the car. iVhen it isdesired to cause a reverse movement of the said shafts, the bars te istwill be moved into engagement with their respective ratchet wheels LB,4.13" andthc bars 44, 4A will be out of enc; ement with their respectivewheels. A reciprocating movement of the bars under these conditions willcause an outward move ment of the shafts 37.

li hen the shafts are being moved toward the center of the car it isdesirable that they be held or detained at the ends of the steps in themovement, in order that they may not slip back while the ratchet barsare being moved into a new engagement with their respective ratchetwheels by the operator. The detaining means for the above purpose com-.rises ratchet bars 5%, which normally est upon. the rat net wheels 4,s'f at one side oi the ratchet bars .4, th.

Each the ratchet wheels &3, 43 is made of greater width than the otherratchet whe ls t and i3 in order to accommodate t These bars 53 and :34are pivotally attached to the car frame by means of a pin 55. This pinis supported by brackets 56, 57 which are rigidly attached to the plates40, 40. The bars 53, 54:, therefore, have a stationary pivot. They areadjustable with relation to this pivot in order to enable them toaccurately engage the teeth of the ratchet wheels L3, 4-3. It isdesirable to adjust the said detent bars within the limits of thelengths of a single tooth, in order that the said detent bars mayprevent the slipping back of the shaft 37 to an extent equal to afractional part of one of the teeth of the ratchet wheels. s adjustmentis eliected by means or" set ws 7T, 78 which are inserted in the hubs 'Gon the said detent bars. These hubs Given an elongated form in order toallow the desired adjustment with relation ment the p are being openedand tho loz: and

unrestricted open movement is desiroutward movement of the desirable tohave the detent t of engagement with their re s ret Wheels. it is alsodesirable when grin 1g in e )eiident movements to 'i he doors, such asis neessary when partly opening; said score or partly closing them, tolift said detent bars army from the ratchet Whe ls. In order to a complsh thi lilting nioveinent l have provided an up- 2.1 ll; tor l llportio; 53, Which teriniin notes in r, horizontal portion 53 at the endof tie det nt bar 53 and a similar arrange said detent ha to he liltedentirely -free oi the shot wheel when the ratchet bars il i, l i

height that ry when reversing tire mechanism ai o hired to the muchgrease is nec J r and chm direction of movement of T he detent liarsWill he lifted, when it is desired to more the shafts 37 mt"; i dly andto dump the load. 'll ese demay also he lifted by hand when the oierutor desires to eii' ect 1. smaller inovein 01 der no hold the hersin their proper 1011 engaged with the desired ratchet wieels, F provideWeighted members (ll, (353, to (5?. Beginning with the n'eiehtedineinher 6-1.- it will be seen to he l it 69 to the plate A slot 68 isproi'ided in said ineinher Set which has a when the ratchet bar er inengagement with the ratchet 3. Jr laterally projecting pin 60,

integg with said l) projects into the slot 35. 'lhis pin serves thepurpose oi htt- (hl when th bar is raised.

e or the bar i l is not (it, because of v ;;lot (58 permits a free move-(30 therein.

.no weight of is fully ei'l'ectire in l in engagement When the 'atchetlot (38 assumes e pos supported elin this posito rennzin in itselecipi'ocating movei to ny appre the weight r-Himiort ('39.

her *il l is in its lower position,

such position being shown in the drawings in and 10 more particularly,the weight (3'3 occupies an elevated position, hecanse of the fact thatt 1e har l i is elevated at the time that the bar t is in its loweposition. The above reniuirhs relating to the e evated position of theWeight 6 t apply also to the 'ht 66 in the position shown in sa'd :2 and10. it Will be seen that When placed in posi L011 the tendency of theight (hi, or 66 LS th case may he, is to hold them in that positioi Thesaid lg'hts will ho d them in that ptsition until the operator 6219isullicient force upon either or the ends 79 or 81 to reverse the saidposition.

in order to allow for the ex'ra Weight of which must he lifted at thatthe bar is lifted, l mater Weight in the body (36 to le body (i l. 'lhis dii'ler- Weight l he snl'licient to be ance e Trey ht oi? the detentbar. 45in entirely 'lar arrangement is provided for the bars though ctcourse in their reversed 3.1. All of the above remarks Which to bars alli and the Weighted inein- .2 i a l. associated with them, vill apply tothe r het liar ll, and the Weighted inenil." Q5, (37. in Fig. 10 thebars are shown iratel'v in more or less diagrammatic in order to makethei relations more 11 is siioivn e sectioml View taken In l spore I.nately on the line l111 cl Figs.

2 zind 3. This section is talten substantially through the pivots TO and71 of the weights G6, 65. The pivot pins 70, 'll ae saouldered in theplates ll), ll) and the Weights are held in position thereon by Washersand 71. The pins are riveted at their ends over the said Washers andalso over the said plates. In this view the different thicknesses oi"-the counterweights (S5, 66 will he ol served. 1 he relations of the earsen, 4MP to said Weights Wi ll be se an, said parts being shown insection. The laterally projecting lugs or pins (31, 62 will lo seen toproject into said Weights. The relation of the actuating lever 48 to thesaid parts Will be seen in this View.

In order to prwent an incoiinplcte stroke of the levers 4:8, id and thusto prevent a slipping back of the shafts 37 to an extent equal to o taction oi the length of: one oi the LQIQQ on the ratchet bars andthereby periittingg; one of the shafts 3? to grain upon 1e otl and toreach its closes posi i -11(l oi tl e other, thereby la an imect clos Vof one of the doors, I 'n'ovide a toll stroke mechanism in con ne :tionWith said levers. This full stroke mechanism comprises lugs S3projecting laterally from the said levers 48, 48" and preferablyintegral therewith, said lugs being adapted to cooperate with curved orsegmental ratchet bars 84, 84. These ratchet bars are pivotally attachedto the framework of the car at 85, 85 in such manner that the weights ofsaid ratchet bars tend to cause them to move inwardly toward the body ofthe car; for accomplishing this purpose the upper ends of the ratchetbars are given a right angular form as shown in the drawings. The inwardmovements in the ratchet bars are stopped by the plates 92, 92 againstwhich the extreme lower ends of said ratchet bars make contact. Theprojecting lugs 83, 83 have sloping surfaces which cause them to easilyslip over the inclined faces of the ratchet teeth 86 in the upwardmovement of the actuating levers 48, 48. In the downward movement ofsaid levers, however, the said lugs have a tendency to engage thehorizontal faces of said teeth and the downward movement is therebyarrested in the event that the said levers have not previously beencarried to the upper extremities of their strokes. In order to preventinterference of the downward movement of either of the levers 48, 48after a complete upward stroke has been effected, a device is introducedfor holding the ratchet bar 84 out of the path of the lugs 83. Thisdevice is moved into its operative position at the extremity of theupward move ment of the levers. This device comprises the cam shapedmember 88 which is pivot ally attached to the ratchet bar 84 by means ofthe pin 89. The normal tendency of the member 88 is to assume a pendentposition with its lower curved face 88 in contact with the stop pin 90.The curved face 88" enables the lever 48 to wedge or cam the member 88into the position shown at the right in Fig. 2. In this position theextremity of the member bears upon the plate 92 and the ratchet bar 84is thereby held in a position spaced from the said plate 92 and in suchposition that the teeth. 86 will not interfere with the downwardmovement of the lug The lower extremity of the ratchet bar 84 isprovided with an inclined face 87 against which the lug 83 strikes atthe lower extremity of its movement and pushes the said ratchet bar toits outermost position. This outward movement is a swinging movementhaving the pin 85 as a pivot and it will be seen that the member 88 willbe drawn away from the plate 92 a sufiicient distance to permit it swingdownwardly and free of said plate. The corresponding member 88 at theleft side of the car, as viewed in Fig. 2, is shown in the abovedescribed lower position.

It will now be seen that when the lug S3 begins its upward movement theratchet bar 84 will be free to move inwardly; and again rest against theplate 92 at its lower end. In view of the fact that one of the arms 48is moving in opposite directions to the other arm 48 throughout theoperation of the mechanism, it will be seen that one or the other of theratchet bars 84 or 84 will be effective at all times in preventing anincomplete stoke of said levers.

The operation of my invention has already been frequently referred toand it will be further stated that when the operator wishes to dump theload in the car he will first manipulate the ratchet bars 44, 44*, 44and 44 in such a manner that the portions 44 and 44 are in contact withthe ratchet wheels 43 and 43", respectively. This he is able to do fromeither side of the car by means of the ends 79, 80 of the bars 44, 44,respectively, on'one side of the car, or by means of the ends 81, 82 ofthe bars 44, 44 on the other side of the car. These ratchet bars areyieldably held in the above described positions against ordinarydisplacing causes by the weights 67, 66. lVhile manipulating the ends79, 80 or the ends 81., 82 as above described, the detent bars 53, 54are moved out of engagement with the ratchet wheels 43, 43 and saiddetent bars will not then interfere with the rotation of said ratchetwheels nor hence with the outward movement of the door supportingshafts. The operator then imparts an oscillating movement to the levers48, 48 by means of either of the ends 58, 59 on either side of the car.This oscillating movement causes a reciprocating movement of the ratchetbars and those particular portions 44 and 44 which are engaged with theratchet wheels 43 and 43 will be effective in causing a movement of theshafts. This movement will be outwardly as above described. Aspreviously described, the operator will be unable to impart other thancomplete strokes to the said levers, because of the full stroke devicecomprising the ratchet bars 84, 84 and the projecting lugs 83, 83

When the operator wishes to close the doors he first manipulates theratchet bars in an opposite manner to that previously described by meansof the ends 79, 80 or 81, 82. When closing the doors he places theratchet bar 44 in engagement with the ratchet wheel 43 and the ratchetbar 44 in engagement with the ratchet wheel 43. By this movement thedetent bars 53, 54 are allowed to drop into engagement with said ratchetwheels. These detent bars prevent slipping back of the door supportingshafts while the inward step by step movement is being effected. Theratchet bars in this inward movement are actuated in a similar manner tothat previously described in connection with the dumping of the load.The operator imparts an oscillating movement to the actuating levers4-8, 48 the end or on either side of the car.

it will he observed that the operator can so manipulate the ratchet harsthat only one of them will be in cont ct with one of the ratchet wheels,in which case the doors on one side only of the car may be operated.This result may be ei'l'ec' d by placing either pair of ratchet bars at,est or it, is" in a mid-position in which neither of the ratchet bars ofsaid pair is in contact with a ratchet Wheel. la doii this it Will benecessary for the operator to retain his hold upon an end 79, 80, 81 or82 of the particuhn; ratchet bars which he Wishes to.

hold in said mid-position.

it Will be seen that vvhen either of the Weights or (37 have an upriohtposit-1c ight is in a much gr n degree thrown upon their pivot pins 69,T0, 71 or lVh-en t most position, however, a much greater portion of theWeight is thrown upon the later ally projecting pins 60, 61, 62 andTherefore, it will be seen that when the Weights are moved to theirlovver positions they are very effective in retaining the ratchet barsin contact with the ratchet Wheels against accidental displacing causes.It will be further seen that when the ctamter-u'cights are in theirupright posi tions they will oscillate easily upon their supportingpivots 69, Y0, 71, 7:2 and will offer little resistance to thereciprocating movements of said ratchet bars.

It will be further seen that the operator is able to partly or Whollyopen the doors on one side of the car or to give them incompletemovements in either direction by first placing one of the ratchethars inmidposition, out of contact vvith a ratchet Wheel and then manipulatingthe levers li-8 If it is desired to open the doors on one side only,either of the detent bars 53 or 5st Will he lifted by hand, according towhich of the sides it is desired to open. The full stroke ratchet bars84., S l may be moved out of the ivay by hand should it become necessaryWhen oscillating the lovers i8, 48* to a less extent than their fullstrokes.

It Will be seen that l have produced very convenient and effectivemechanism for the various purposes described.

llhile I have described more or less precisely the details ofconstruction, I do not Wish to be understood as limiting myself thereto,as l contemplate changes in form and the proportion of parts and thesubstitution of equivalents as circumstances may sugg st or renderQ'lipfitlltlllli Without departing from the spirit of my invention.

I claim:

1. In a car having a dump door, a shaft for holding said door in aclosed position, a ratchet Wheel fixed to said shaft, and a by means ofv are in their lowerratchet liar adapted to engage said Wheel and givesaid shaft a movement with relation to its supporting position, theteeth on said "\vheel being undercut to prevent diseng cement of theteeth of the ratchet bar therefrom.

In a car havine a dump door, a shaft for holci said door in a closedposition, a ratchet wheel fixed to said shaft, and a ratchet bar adaptedto engage said Wheel and. to give said shaft a movement with re lationto its supporting position, the teeth on a d Wheel being undercut andthe enga n urfaces of the teeth on the ratchet har having a backwardslope to prevent disanent of said teeth.

in a car having dump door, a shaft for holding said door in a closedposition, a ratchet wheel fixed to said shaft, and a ratchet bar adaptedto engage said Wheel and to give said shaft a movement with relation toits supporting position, the teeth on said Wheel having curved faces,and the e urfaces of the teeth on the ratchet bar having a backwardslope to prevent disengagement of said teeth.

4-. in a. car having a dump door, a supporting shaft for said door, areciprocating ratchet bar adapted to give said shaft a movement Withrelation to its supporting position, and means for retaining during thereturn stroke of said bar, said shaft in position at the end of eachadvancing stroke of the reciprocating movement of the bar.

In a car having a dump door, a supporting shaft for said door, a ratchetWheel fiiiEfil on said shaft, a reciprocating ratchet bar adapted toengage said Wheel and to give it a rotary motion when reciprocated,means by which the rotation of said shaft causes its movement withrelation to its supporting position, and means for retaining during thereturn stroke of said bar, said shaft in position at the end of eachadvancing stroke of the reciprocating movement of the bar.

6. In a car having a dump door, a supporting shaft for said door, aratchet Wheel fixed on said shaft, a reciprocating ratchet bar adaptedto engage said Wheel and to to it a rotary motion When reciprocated,means by which the rotation of said shaft causes its movement withrelation to its supporting position, and a detent bar having teethadapted to engage said ratchet Wheel and prevent its rotation in theopposite direction to that produced by said first named ratchet bar.

7. In a car having a dump door, a sup porting shaft for said door, aratchet Wh eel fixed on said shaft, a reciprocating ratchet bar adaptedto engage said Wheel and to give it a rotary motion When reciprocated,means by which the rotation of said shaft causes its movement withrelation to its supporting position, a detent bar having teeth adaptedto engage said ratchet wheel and prevent its rotation in the oppositedirection to that produced by said first named ratchet bar, and meansfor adjusting said detent bar with relation to the engagement of itsteeth with the teeth of the ratchet wheel and with relation to the teethof said ratchet bar.

8. In a car having a dump door, a supporting shaft for said door, aratchet bar adapted to give said shaft a movement with relation to itssupporting position, a detent member for said shaft, and means by whichsaid ratchet bar may cause said detent memher to become operativelydisengaged from said shaft when said ratchet bar 1S operativelydisengaged from said shaft.

9. In a car having a dump door, a supporting shaft for said door, aratchet bar adapted to give said shaft a movement with relation to itssupporting position, and means actuated by the operator and pivotallyattached to said ratchet bar for imparting a reciprocating movement tosaid bar.

10. In a car having a dump door, a supporting shaft for said door, aratchet bar adapted to give said shaft a movement with relation to itssupporting position, and means pivotally attached to the car frame andto said ratchet bar for imparting a reciprocating movement to said bar.

11. In a car having a dump door, a supporting shaft for said door, aratchet bar adapted to give said shaft a movement with relation to itssupporting position, and means pivotally attached to the car frame andto said bar, and capable of being actuated by the operator from eitherside of the car for imparting a reciprocating movement to said ratchetbar.

12. In a car having a dump door, a supporting shaft for said door, aratchet bar adapted to give said shaft a movement with relation to itssupporting position, means pivotally attached to the car frame and tosaid bar, and capable of being actuated by the operator from either sideof the car for imparting a reciprocating-movement to said ratchet bar,and a detent member pivotally attached to the car frame and adapted toengage said shaft.

13. In a car having a dump door, a supporting shaft for said door, aratchet bar adapted to give said shaft a movement with relation to itssupporting position, means pivo-tally attached to the car frame and tosaid bar, and capable of being actuated by the operator from either sideof the car, for imparting a reciprocating movement to said ratchet bar,a detent member pivotally attached to the car frame and adapted toengage said shaft, and means by which said detent member may beoperatively disengaged from said shaft when said ratchet bar isdisengaged therefrom.

14. In a car having a plurality of dump doors, reciprocating supportingshafts for said doors, a ratchet bar having separate series of teethadapted to engage andactuate said supporting shafts, one only, at atime, with relation to their supporting positions, and means forimparting a reciprocating movement to said ratchet bar.

15. In a car having a plurality of dump doors, reciprocating supportingshafts for said doors, a ratchet bar having separate series of teethadapted to engage and actuate said supporting shafts respectively, oneonly, at a time, with relation to their sup portin positions, saidratchet bar being movable to a position wherein another of said seriesof teeth on said bar is adapted to engage and give a movement to anotherof said supporting shafts respectively, and means for imparting areciprocating movement to said ratchet bar.

16. In a car having a plurality of dump doors, reciprocating supportingshafts for said doors, a ratchet bar having separate series of teethadapted to engage and actute said supporting shafts respectively, onenly, at a time, with relation to their supporting positions, saidratchet bar being movable to a position wherein another of St id seriesof teeth on said bar is adapted to engage and give a movement to anotherof said supporting shafts respectively, and a detent member for one ofsaid shafts, and means for imparting a reciprocating movement to saidratchet bar.

17. In a car having a plurality of dump doors, reciprocating supportingshafts for said doors, a ratchet bar having separate series of teeth,each series adapted to engage and actuate one of said supporting shaftsrespectively with relation to its supporting position, said ratchet barbeing movable to a position wherein another of said series of teeth onsaid bar is adapted to engage and give a movement to another of saidsupporting shafts respectively, a detent member for one of said shafts,means whereby said detent member will be operatively disengaged fromsaid shaft when said ratchet bar is disengaged therefrom, and means forimparting a reciprocating movement to said ratchet bar.

18. In car having a plurality of dump doors, reciprocating supportingshafts for said doors, and a ratchet bar having separate series of teethadapted to engage and actuate said supporting shafts, one only, at atime, with relation to their supporting positions, and means pivotallyattached to said ratchet bar and to said car frame for imparting areciprocating movement to said bar.

19. In a car having a plurality of dump doors, reciprocating supportingshafts for said doors, a ratchet bar having separate series of teethadapted to engage and actuate said supporting shafts, one only, at atime,

with relation to their supporting positions, and means capable of beingoperated from either side of the ear for giving a reciprocating movementto said ratchet bar.

20. in a car having a plurality of di doors, reciprocating SlppOli'iiigshafts ioi said doors, a ratchet bar hai-iing separate series of teethadapted to engage and acti ate said supporting shafts, one only, at atime, with relation to their supporting positions, said ratchet barbeing movable to positions wherein it will engage 111d actuate one orthe other of said shafts at the will of the operator, means forresisting displacement of said bar from said positions, and means forimpart-iin a reciprocating movement to said 'atcliet bar.

21. in a car having a plurality of damp doors, reciprocating supportingshafts for said doors, a 'atchet bar ht viiig separate se ries of teethin diilerent portions thoreoi adapted to engage and actuate saidsupporting shafts, respectively, one only at a time, with relation totheir supporting posi $10115, said ratchet bar being movable topositions wherein it will engage and actuate one or the other of saidshafts at the will of the operator, weighted men'ibers pivotally attached to the car frame, one of which is placed adjacent each of said sl the greater pressure being e. portion of said bar which is 22-. In acar having a plurality of dum i doors, reciprocating sup iorting sl forsaid doors, a ratchet bar havin rate series of teeth adapted to engageand actuate said supporting shafts, one only at a time with relation totheir supportins paid ratchet bar l eing movable operator, a detentmeinl er ror shafts, means by which said ra gagement with its respectiveshaft means for resisting diseng: 'ient of said bar from the particularshatnith which it may be engaged, sail resisting means being adapted toexert less resisuince to the movement of said bar when disengaging saiddetent member, and means for imparting a recin'oeating movement to saidratchet bar.

in a car having a plurality of dump door, reci irocating supportingshafts for said doors, a ratchet bar having separate series of teethadapted to and actuate one or the other respectively of said supportingshafts at the vill of the operator, means for resisting disengagement ofsaid bar from said shaft, a second ratchet bar like said first named barexcept that its teeth are (.PPUS-ltCly slo ied and adapted to engage andactuate the shaft not engaged by said named bar in the oppositedirection to nain d shaft, means for resisting genient of said secondnamed bar t ii rid shaft, and means for imparting a ecinr ,catiiio'movement to said bars.

0 AD let. in car having a plurality of dump appearing supporting snal'tsfor i o ratchet bar iavin separate ses of tteti acapted to engage andactuate i shaitts, one only, at a time, with relation to theirsupporting positions, said ratchet bar being movable to positions.ieroin it will engage and actuate one or the other of said shai'ts atthe will ot the operator, means tor resisting displacement at bar tromsaid positions, a second ratchet bar like said first named bar exceptteeth are oppositely sloped and ted to engage and actuate the shaft notnd by said first named bar in the oppod rcction to said first namedshail't, for FESlStlilQ' diseii 'a 'enieiit of said is 32 t]: I

d bar from said shalt, means for nst named means. ,viiig a plurality ofdamp shafts for said doors, a

:11 l 'ed to give said shafts reciprocating mm einents with relation totheir sup positions, means capable of being oper d from either sideofthe car for actuating said. bar, and means for preventing incompletestrokes of said actuating car lav'i' a dump door, a supp rting shaft forsaid door, a ratchet bar adapted to give said shaft reciprocating m,ents with relation to its supporting pos 7 ii, and means for preventingincompie, *lro xes of said ratchet bar.

in, a car having dump doors, movable supporting members for holding saiddoors in their ch sed positions, actuating means for id memberspivotally mounted on the car nine adjacent the center tliereoi andoperol said meinbers at the. will of the operator. 29. in a car havingdump doors, movable supporting members for holding said doors in theirclosed positions, actuating means pivotally attached to the car frame atthe center thereof and operable at either side of the car, reciprocatingmeans moved by said actuating means for moving said members withrelation to their supporting positions, said reciprocating means beingadjustable at either side of the car for reversing the movement of saidmembers.

30. In a car having dump doors, movable supporting members for saiddoors, actuating means pivotally attached to the car frame between thesides thereof and having an oscillatory movement, and means by whichsaid oscillatory movement may effect an intermittent movement of saidsupporting members with relation to their supporting positions.

31. In a car having dump doors, movable supporting members for saiddoors, actuating means pivotally attached to the car frame between thesides thereof having an oscillatory movement, and means by which saidactuating means may impart an intermittent movement to said supportingmembers with relation to their supporting positions, said means beingadapted to reverse the direction of movement imparted to said members atthe will of the operator.

32. In a car having dump doors, movable supporting members for saiddoors, actuating means pivotally attached to the car frame between thesides thereof having an oscillatory movement, said actuating means beingoperable from either side of the car, and means by which saidoscillatory movement may effect an intermittent movement of saidsupporting members with relation to their supporting positions.

33. In a car having dump doors, movable supporting members for saiddoors, actuating means pivotally attached to the car frame between thesides thereof having an oscillatory movement, said actuating membersbeing operable from either side of the car, and means by which saidactuating means may impart an intermittent move ment to said supportingmembers with relation to their supporting positions, said means beingadapted to reverse the direction of movement imparted to said members atthe will of the operator.

84. In a car having dump doors, movable supporting members for holdingsaid doors in their closed positions, actuating means pivotally attachedto the car frame at the center thereof and operable at either side ofthe car, reciprocating means moved by said actuating means for movingsaid members with relation to their supporting positions, saidreciprocating means being adjustable for reversing the direction ofmovement of said members at the will of the operator, and means forretaining said reciprocating means in its adjusted position.

35. In a car having dump doors, movable supporting members for saiddoors, oscillatory actuating means pivotally attached to the car frameand reaching to either side, and means by which said actuating means maymove said supporting members with relation to their supportingpositions.

36. In a car having dump doors, movable supporting members for saiddoors, actuating means pivotally attached to the car frame and reachingto either side, means by which said actuating means may move saidsupporting members with relation to their supporting positions, andmeans for reversing the efiect of said last named means on saidsupporting members.

37. In a car having dump doors, movable supporting members for saiddoors, actuating means pivotally attached to the car frame and reachingto either side, means by which said actuating means may move saidsupporting members with relation to their supporting positions, meansfor reversing the effect of said last named means on said supportingmembers, and means for retaining said reversing means in its reversedcondition.

38. In a car having dump doors, movable supporting members for saiddoors, reciprocating means adapted to give said shaft a movement withrelation to its supporting position, a single means pivotally attachedto the frame of the car between the sides thereof and operable fromeither side of the car for actuating said reciprocating means.

In testimony whereof, I have subscribed my name.

HENRY A. PARKS,

FLORENCE A. FLoRELL.

Copies 0! this patent may be obtained for five cents each, by addressingthe flommissioner of Patents,

Washington, D. G.

